Underbones
2018Yamaha Jupiter Z1
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The 2018 Yamaha Jupiter Z1 is a popular underbone commuter in Southeast Asia. Its air-cooled 113.5cc single makes 9.9 Nm through a four-speed gearbox and chain. A 765 mm seat, 102 kg dry weight and 4.1-litre tank make it economical and nimble in traffic.
- Capacity
- 113.5 ccm
- Engine
- Single, four-stroke
- Gearbox
- 4-speed
- Dry weight
- 102.0 kg
- Seat height
- 765 mm
- Power
- 13.5 HP (9.8 kW) @ 7750 RPM
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built as a practical commuter cub for short urban and suburban trips rather than performance or adventure riding.
- Built for
- A humble, no-nonsense workhorse that prioritizes fuel efficiency, reliability, and ease of use over excitement.
- Not ideal for
- This is not the bike for riders seeking highway speed, long-distance touring comfort, or any kind of off-road capability.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Will it fit you?
Worked out in your browser - nothing is sent to usEngine
- Capacity
- 113.5 ccm
- Power
- 13.5 HP (9.8 kW) @ 7750 RPM
- Torque
- 9.9 Nm (1.0 kgf-m) @ 6500 RPM
- Engine type
- Single, four-stroke
- Power/weight ratio
- 0.1324 HP/kg (dry)
- Bore x stroke
- 50.0 x 57.9 mm
- Compression
- 9.3:1
- Cooling system
- Air
- Fuel system
- Injection
- Starting
- Electric & kick
- Ignition
- TCI
- Lubrication system
- Wet
Transmission
- Gearbox
- 4-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- Wet, Sentritugal, Multipat
Dimensions & weight
- Wheelbase
- 1240 mm
- Overall length
- 1935 mm
- Overall width
- 680 mm
- Overall height
- 1065 mm
- Seat height
- 765 mm
- Dry weight
- 102.0 kg
- Fuel capacity
- 4.10 litres
Chassis & suspension
- Frame
- Underbone
- Front suspension
- Telescopic
- Rear suspension
- Swing Arm Double Suspension
Brakes & wheels
- Front brakes
- Single disc. Hydraulic.
- Rear brakes
- Expanding brake (drum brake)
- Front tyre
- 70/90-M17
- Rear tyre
- 80/90-M17
Other
- Color options
- Green, red, blue, black, white
Specs last verified against published sources: .
Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.
What changed, year to year
Differences highlighted| Specification | 2017 | 2018 | 2019 | 2020 | 2022 | 2023 |
|---|---|---|---|---|---|---|
| Capacity | 114 cc | 114 cc | 114 cc | 114 cc | 114 cc | 114 cc |
| Dry weight | 102 kg | 102 kg | 102 kg | — | — | — |
| Seat height | 765 mm | 765 mm | 765 mm | 765 mm | 765 mm | 765 mm |
| Fuel capacity | 4.1 L | 4.1 L | 4.1 L | 4.1 L | 4.1 L | 4.1 L |
Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.
Rider Reviews
Common questions
What is the engine size of the Yamaha Jupiter Z1?
The 2018 Yamaha Jupiter Z1 has a Capacity of 113.5 ccm (6.93 cubic inches).
What engine power does the Yamaha Jupiter Z1 have?
The 2018 Yamaha Jupiter Z1 has a Power of 13.5 HP (9.8 kW) @ 7750 RPM.
How many gears does the Yamaha Jupiter Z1 have?
The 2018 Yamaha Jupiter Z1 has a Gearbox of 4-speed.
What is the torque of the Yamaha Jupiter Z1?
The 2018 Yamaha Jupiter Z1 has a Torque of 9.9 Nm (1.0 kgf-m or 7.3 ft.lbs) @ 6500 RPM.
How much does the Yamaha Jupiter Z1 weigh?
The 2018 Yamaha Jupiter Z1 has a Dry weight of 102.0 kg (224.9 pounds).
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